PoiuyZ
Novize
I can think of a few but do not live up to your expectations. Seto yuuki (Stretta, Stringendo, Accelerando, allargando,...)has a few good stories that intertwine with each other; Tsuyatsuya, Tatoeba Haha Ga are six volumes (I don't remenber exactly) and Azuki Kurenai-Mrs no Kokuhaku, a great history of love between a teacher a former student.